The isis ipv6 suppress-reachability command enables IS-IS to suppress the advertisement of interface addresses so that they can be reused.
The undo isis ipv6 suppress-reachability command restores the default setting.
By default, interface addresses can be advertised.
| Parameter | Description | Value |
|---|---|---|
| level-1 |
Suppresses the advertisement of only Level-1 interface addresses. |
- |
| level-1-2 |
Suppresses the advertisement of Level-1 and Level-2 interface addresses. |
- |
| level-2 |
Suppresses the advertisement of only Level-2 interface addresses. If no level is specified, the advertisement of Level-1-2 interface addresses is suppressed. |
- |
| ipv6 |
Suppresses the advertisement of IPv6 addresses. If this parameter is not specified, the advertisement of IPv4 addresses is suppressed. |
- |
100GE interface view, 10GE interface view, 25GE sub-interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE electrical interface view, Global VE sub-interface view, Loopback interface view, Tunnel interface view, VBDIF interface view, VE sub-interface view, VE interface view, VLANIF interface view
Usage Scenario
If you want a local interface to be used only for topology connection, you can run the isis ipv6 suppress-reachability command to enable IS-IS to suppress the advertisement of the local interface's IP address. This configuration prevents traffic whose destination IP address is the interface's IP address from being sent to the local device. In addition, this configuration also shields the local interface's IP address.